Kubernetes Basics

The gap between a manifest that runs and one that is production-ready is exactly the fields people omit: no resource requests means the scheduler packs pods blind and the node OOMs; no readiness probe means every rollout routes traffic to cold pods and users see 502s; no PodDisruptionBudget means a routine node drain takes the whole service down. This skill produces manifests where every one of those fields is set deliberately.

Core objects

• Deployment: manages replica Pods and rolling updates.
• Service: stable network endpoint for a set of Pods.
• ConfigMap/Secret: configuration and credentials, injected as env vars or files.
• Ingress: HTTP routing into the cluster.

Operating procedure

Step 1: Gather inputs